Pumping jack



Sept. 8, 1925.

J. W. EDWARDS PUMPING JACK Filed March 2. 1925 2 Shoots-Sheet 1 JhJP J/i J. W. EDWARDS PUMPING JACK Sept. 8, 1925. 1,553,224

Filed March 2, 1925 2 Shuts-Sheet 2 I fl MAJ GHQ: "2115 Patented Sept. 8, 1925.

JOsnrH w. EDWARDS, or TULSA, OKLAHOMA.

PUMPING JACK.

Application filed March 2., 1925. Serial No. 12,581.

To all whom it may concern:

Be it known that I, JOSEPH W. Eowanns, a citizen of the United States, residing at Tulsa, in the county of Tulsa andState of Oklahoma, have invented certain new and useful Improvements in Pumping Jacks, of which the following is a specification.

My invent-ion relates to Improvements in well drilling apparatus and particularly to pumping jacks and mountings therefor. The primary object of the invention is the provision of a novel form of pumping jack wherein the vertical loci of the pumping rod remains constant in the vertical axis of the well casing at all points during operation.

Another object is the provision of an improved pumping jack wherein the causes of side swing in the pumping rod are eliminated and wherein the pumping rod is maintained in the perpendicular.

Still another object of the invention is the provision of an improved pumping jack which may readily be removed from operating position when it is desired to have free access to the well casing.

Further objects of the invention are the provision of means in a pumping jack for preventing binding of a rod against the edge of a well tubing or casing; and such objects as will be readily apparent to those skilled in the art, from the description.

With these objects in view, the invention resides in the novel construction, combination, and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawings of which Figure l is an elevation of a pumping jack and rod:

Figure 2 is a diagrammatic representation of the operating cycle:

Figure 3 is a top plan view of the jack, with parts thereof broken away for clearness of detail:

Figure 4 is an end elevation from the right of Figure 1:

Figure 5 is an elevation of the rod guide.

The jack is constructed of side bars and 11 suitably spaced in parallel relation, between which is disposed a spacer bar 12 carrying a bearing 13 on which is mounted the usual rocking V 14 secured on the under face of the long arm 15 of a bell crank lever, the short arm 16 of which rises perpendicularly therefrom at one end, being supported by the diagonal brace rod 17. The pull rod '24 and 25, the lower ends of which are pivoted to the side bars 10 and 11 of the.

jack frame.

Mounted on the forward transverse frame bar 26 are pairs of spaced cars 27 and 28 in line with each side bar 10 and 11 between which are pivoted the constricted lower ends 29 and 30, of pipe sections 31 and 32 having secured on their upper ends T head connectors 33 and 34. These T head connectors are disposed in the vertical planes of the side bars 10 and 11, with their upper portions inwardly offset and supporting spaced pairs of rod guides 35 and 36, with their respective upper terminals connected by a transverse spider 37. The entire rod guide framework is supported in a position at an angle to the perpendicular and outwardly of the jack frame, by means of diagonal side braces 38 and 39 provided with turnbuckles 40 and 41 and connected at their upper ends with the spider 37 and their lower ends to the pivot connections of the side braces: 24 and 25 with the side bars 10 and 11 of the jack frame. e

The forward end of the jack beam 22 is bifurcated, terminating in the forked arms 42 and 43, which are pivoted over lateral trunnions 44 carried by squared cross-head blocks 45 and 46, grooved for engagement with, and vertically slidable between the respective rod guides 35 and 36.

The well. pumping rod 47 is pivotally suspended from the free end of the beam by means of lateral trunnions 48 and 49 arranged in cupped bearing sockets 50 and 51 formed in bearing plates 52 and 53 resting on the outer ends of the beam arms 42 and 43 and rigidly secured thereto so that the bearings 50 and 51 remain at all times fixed relative to the arms 42 and 43.

In jacks as used at present, there is a side swing of the pumping rod in the plane of the longitudinal center of the jack frame, owing to the arc in which the free end of the jack beam moves. This causes the rod to bind against the edge of the well tube or casing, necessitating frequent replacements for Wear, and hindering operations. In my invention, this side swing is eliminated by causing the pump end of the jack beam to move vertically, not in an arc, but in an angle to the perpendicular, \vhich angle is regulated by position of the guide frames supported on the legs 31 and 32, adjustments being made through the medium of the turnbuckles 40 and L1 in the brace bars 38 and 39. This angle is so adjusted, that With the jack beam in horizontal position, as shown in Figure 1, the pumping rod and trunnions l are centered in a vertical plane passed through the pump rod axis, which is centered in the Well casing.

The cycle of operation is best shown in Figure 2 Where L represents the loci or line of vertical movement maintained by the pumping rod, and A the line of angle along which the cross-heads travel in their guide.

As illustrated in Figure 1, the pivot connections P already described, permit the jack beam 22 to move vertically as Well as longitudinally, so that in the upward move ment of the beam and rod as the cross head guides are fixed, the beam Will assume the position shown above the center line in Figure 2, While in the downward movement, it will assume the lower position. Inasmuch as the bearing plates for the pump rod trunnions 48 and. 4-9 are fixed relative to the beam, the axis of the pump rod will at all times coincide with the axis of the Well casing, following the line L of Figure 2.

Whcn it is desired to have free access to the veil casing, for cleaning or other purposes, the braces 38 and are detached, permitting the guide frames to be swung back on the main frame, and owing to the pivotal connections of the jack beam and its lateral braces, the entire mechanism may be folded back upon itself to clear the Well top.

While in this preferred Ql1'1l')0(ll1l'l8nt of the invention I have illustrated certain details entering into the construction and operation of the invention, I desire it to be understoodthat the invention is not to be limited there by, but that any desired changes and modifications of the structural details may be made, as will fall Within the scope of the invention as claimed.

1 claim 1. A pumping jack comprising a frame, a jack beam pivoted therein, means for re ciprocating one end of said beam, guide frames at each side of said beam, crossheads on said beam and vertically movable in said guide frames, and means for securing said guide frames at an angle to the perpendicular.

2. A pumping jack comprising a frame, a jack beam pivoted at one end therein, means for operating said beam, a pump rod bearing carried by the free end of said beam, and means for guiding the movement of the free end of said beam at an angle to the perpendicular to maintain the center of said bearing in a fixed vertical loci during move ment of said beam.

3. A pumping jack comprising a main frame, a jack beam in said frame, means for operating said jack beam, a guide for said beam supported on said frame, andincans for adjustably supporting said guide.

4. A. pumping jack comprising a main frame, a jack beam and operating mecha nism therefor in said frame, and connection between said beam, mechanism and frame whereby the beam may be folded back upon said frame to clear a Well casing.

5. A. pumping jack comprising a main frame, a jack beam and operating mechanism therefor in said frame, a jack beam guide in said fran'ie, and means whereby suit guide, beam and mechanism may be folder bilClI on said frame to clear a well casing.

In testimony whereof I affix-my signature.

JOSEPH V. EDYVARDS. 

